causes of influenza
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Influenza Influenza, commonly known as the flu, is an infectious disease caused by an influenza virus. Symptoms can be mild to severe. The most common symptoms include: a high fever, runny nose, sore throat, muscle pains, headache, coughing, and feeling tired. These symptoms typically begin two days after exposure to the virus and most last less than a week. The cough, however, may last for more than two weeks.
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- Influenza (flu), on the other hand, is a viral infection that mimics a cold except that it starts forcefully with symptoms of fatigue, fever, and respiratory congestion. While more than 100 different virus types can cause a common cold, only influenza virus types A, B, and C cause flu.
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Public Health Influenza (the flu) is an infection of the nose, throat, and lungs caused by influenza viruses. There are many different influenza viruses that are constantly changing. They cause illness, hospital stays and deaths in the United States each year. The flu can be very dangerous for children.
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- About the Flu Virus. Influenza, or flu, is a respiratory infection caused by any of several flu viruses, which are classified as type A, B, or C based on their nucleic acids and protein composition. Type A viruses are found in humans and many animals, including ducks, chickens, pigs, and whales.
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Flu Symptoms & Complications A wide range of complications can be caused by influenza virus infection of the upper respiratory tract (nasal passages, throat) and lower respiratory tract (lungs). While anyone can get sick with flu and become severely ill, some people are more likely to experience severe flu illness.
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Influenza Some of the subtypes of influenza A that have caused the largest number of known human deaths are:14, 15. 1  H1N1, which caused Spanish Flu in 1918 and Swine Flu in 20091. 2  H2N2, which caused Asian Flu in 19572. 3  H3N2, which caused Hong Kong Flu in 19683. 4  H5N1, which caused Bird Flu in 20044.
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- Influenza. H5N1 is a type of influenza virus that causes a highly infectious, severe respiratory disease in birds called avian influenza (or bird flu).5N1 infection in humans can cause severe disease and has a high mortality rate. If the H5N1 virus were to change and become easily transmissible from person to person while retaining its capacity to cause severe disease, the consequences for public health could be very serious.
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Test Center Influenza is caused by different influenza viruses, most commonly type A but also type B. The infection usually manifests as an acute upper respiratory illness lasting 7 to 10 days, but it may also progress to viral pneumonia, or be complicated by a secondary bacterial infection.
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Influenza The flu can worsen chronic health problems. People with emphysema, chronic bronchitis or asthma may experience shortness of breath while they have the flu, and influenza may cause worsening of coronary heart disease or congestive heart failure.
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Influenza Influenza, commonly known as the flu , is an infectious disease caused by the influenza virus. Symptoms can be mild to severe. The most common symptoms include: a high fever, runny nose, sore throat, muscle pains, headache, coughing, and feeling tired.hree types of influenza affect people. Usually, the virus is spread through the air from coughs or sneezes. This is believed to occur mostly over relatively short distances. It can also be spread by touching surfaces contaminated by the virus and then touching the mouth or eyes.
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- Influenza, commonly known as the flu , is an infectious disease caused by the influenza virus. Symptoms can be mild to severe. The most common symptoms include: a high fever, runny nose, sore throat, muscle pains, headache, coughing, and feeling tired.nfluenza, commonly known as the flu , is an infectious disease caused by the influenza virus. Symptoms can be mild to severe. The most common symptoms include: a high fever, runny nose, sore throat, muscle pains, headache, coughing, and feeling tired.
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- Influenza (Flu). The flu is an infectious disease that causes symptoms such as fever, cough, sore throat, headache, muscle aches, and chills.
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Flu The flu is caused by an influenza virus. Most people get the flu when they breathe in tiny airborne droplets from the coughs or sneezes of someone who has the flu. You can also catch the flu if you touch something with the virus on it, and then touch your mouth, nose, or eyes.
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What are flu (influenza) symptoms in adults and in children? Influenza, commonly called the flu, is caused by viruses that infect the respiratory tract. Flu symptoms include fever, chills, cough, sore throat, headache, muscle aches, and. fatigue. The incubation period for flu is about one to four days. Flu is contagious, and symptoms may last up to seven to 14 days.
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- 1 Influenza (Fl u)Publication Date: September 25 th 2015 What is influenza (a lso called flu)? Influenza is an acute contagious respiratory illness caused by infectionwith an influenza virus. Influenza can occur throughout the year butinfluenza activity usually peaks in winter.There are three types in all with influenza A and influenza B causingthe majority of infections. A third type, influenza C, is rarely reportedas a cause of human illness.Influenza viruses infect the nose, throat and lungs.
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Flu Back to Top Causes. The flu is caused by an influenza virus. Most people get the flu when they breathe in tiny airborne droplets from the coughs or sneezes of someone who has the flu. You can also catch the flu if you touch something with the virus on it, and then touch your mouth, nose, or eyes. People often confuse colds and flu. They are different, but you might have some of the same symptoms. Most people get a cold several times a year.
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Influenza Influenza, commonly known as the flu, is an infectious disease caused by an influenza virus. Symptoms can be mild to severe. The most common symptoms include: a high fever, runny nose, sore throat, muscle pains, headache, coughing, and feeling tired.
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Donât Be a Shot Dodger! About Influenza (Flu) Viruses. Influenza (the flu) is a contagious respiratory illness caused by influenza viruses. It can cause mild to severe illness, and at times can lead to death. Some people — such as older people, young children, and people with certain health conditions — are at high risk for serious flu complications. The best way to prevent the flu is by getting vaccinated each year. Seasonal influenza vaccine must be changed each year as the viruses naturally change over time.
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- Influenza, or flu, is a caused by a virus infecting the respiratory system, meaning your nose, throat, bronchial tubes, and lungs.
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- Flu (Influenza) Overview. Influenza, or flu, is a respiratory infection caused by several flu viruses. Like the common cold, it infects the nose, throat, and lungs. Most people who get the flu get better within a week, although they may have a lingering cough and tire easily for a while longer.easonal flu refers to the flu outbreaks that occur each year, mainly in the late fall and winter. The disease spreads through communities, creating an epidemic. During the epidemic, the number of cases peaks in about three weeks and subsides after another three to four weeks.
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- Influenza is also called the flu and is caused by the Influenza virus. This virus targets the respiratory tract and results in an infection that settles into the nose, sinuses, throat, bronchial tubes and possibly the lungs.
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Influenza (Seasonal Flu) - Topic Overview The flu is caused by influenza viruses A and B. There are different strains of the flu virus every year. The flu causes a fever, body aches, a headache, a dry cough, and a sore or dry throat. You will probably feel tired and less hungry than usual. The symptoms usually are the worst for the first 3 or 4 days.he flu is caused by influenza viruses A and B. There are different strains of the flu virus every year. The flu causes a fever, body aches, a headache, a dry cough, and a sore or dry throat. You will probably feel tired and less hungry than usual. The symptoms usually are the worst for the first 3 or 4 days.
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Key Facts About Influenza (Flu) The flu is a contagious respiratory illness caused by influenza viruses that infect the nose, throat, and lungs. It can cause mild to severe illness, and at times can lead to death. The best way to prevent the flu is by getting a flu vaccine(https://www.cdc.gov/flu/protect/keyfacts.htm) each year.
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- Influenza, commonly known as the flu, is an infectious disease caused by an influenza virus.[1] Symptoms can be mild to severe.[4] The most common symptoms include: a high fever, runny nose, sore throat, muscle pains, headache, coughing, and feeling tired.
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Influenza A virus The Influenza A virus subtypes that have been confirmed in humans, ordered by the number of known human pandemic deaths, are: H1N1 caused Spanish Flu and the 2009 swine flu outbreak (novel H1N1) H2N2 caused Asian Flu. H3N2 caused Hong Kong Flu. H5N1 is bird flu, endemic in avians.
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Swine influenza Influenza, more commonly known as “the flu,” is caused by a contagious virus. Symptoms include body aches, sore throat, headache, fever, coughing, and chills. Perhaps because influenza is so common, misconceptions about the disease abound.nfluenza is still very common in the U.S.: According to the Centers for Disease Control and Prevention, between 5 percent and 20 percent of Americans get the flu every year, and about 36,000 cases are fatal. The disease can be treated by antiviral medicines, and a seasonal vaccine is available to protect against it.